Tabbing-machine



F. M. CASE.

TABBING MACHINE.

APPLICATION msn MAR.18.1915.

Patented Jan. 11, 1921.

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F M. CASE.

IFABBING WCHiNE. mfucATloH man MAR. la, :915.

Patented .13.11.11, 1921.

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La 'im F. M. CASE.

TABBING MACHINE. APPLlcAnoN FILED MAR.18.1916.

Patented Jan. 11, 1921;

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F. M. CASE.

TABBING MACHINE. APPLICATION man MAR, 18. 1916.

Eatented Jan. 11, 1921.

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FRANCIS ivi. CASE, or CLEVELAND, oiiio, Ass'iGNoit 'i'o J. C. HUB, 0F CLEVELAND,

y 'OHIO' V Therme-MACHINE.

To @ZZ whom t may concern.'

Be it known that I, FRANCis M. CASE, citizen of the .United States, residing at Cleve.- land, in the county of Cuyahoga and State ofOhio, have invented certain new and useful `Improvements in Tabbing-Machines, of which the following is a specification.

This invention relates to tabbing machines and particularly to that class of sucli'devices utilized in applying Celluloid 4tabs to,

cards or sheets. f i

More specifically the invention s relates vto an amalgamating machine comprising va movable conveyer, preferably of the wheel type and having upon its periphery a, plu-` rality of heated pressing devices adaptedy to receive a card with an applied tab and hold the saine for a suflicient length of time to permit thelieat to fasten the tab to the card with suitable mechanism for rotating the conveyer or wheel interniediately and for delivering cards thereto and ejecting them` therefrom.

The invention may be further brieliy summarized as consisting in the construction and combination of parts hereinafter set forth in the following description, drawings and claims. f

Figure 1 represents a viewin side elevation showing the device; Fig.y 2 is a detailed view of the lock; Fig. 3 is a side elevation of the oppositeside of the machine; Fig. 4 is a detailed view in side elevation showing the mechanism for rotating the wheel. step by step; Fig. 5 is a view partly in elevation and ypartly in section looking from the front or the feeding-end; Fig. 6 'is an enlarged view partly in section and partly kin elevation looking at aportion of the wheel and showing the mechanism for controlling the y closing of the heated pads; Fig. 7 is a section upon the line 7-7 of Fig. 3; Fig. 8 is a view showing the cam for closing the pads jin section and showing the temporary cam lever in top plan with its actuating devices in top plan; Fig. y91s a horizontal sectional view taken through the center of the machine and showing some of the parts in elevation; Fig.

10 is a section on the` line 10-10 of Fig. 6

looking in the direction of the arrows; and Fig. 11 is a detailed sectional view yshowing a portion vof one of the heating elementsv utilized in the pads.

In the embodiment shownin the drawings 1 represents a frameiprovided with two- Specification of Letters Patent. Patented Jan. 11, 1921. Appiieaziovn iiiealiarch is, ieis. serial N. 85,148. i

spaced bearings2 one on `either side and toward the rear of the frame. Mounted in these bearings is a supporting shaft 3 adapt- .,ed to receive a supporting wheel comprising a hub 4, spokes 5 and a pairof spaced rims 6. Integral lwith these rims, `as shown in Fig. 6, are outwardly extending brackets '7, n

spaced evenly about the-machine and having a fiat' face for receiving a stationary'pad 8. i

This padl is provided; with suitable openings `9 for receiving heating yelements to be latei described.l rIhere arek twelve of these pads shown on thewheel set forth in the drawings andthe faces of these` pads are radiallydisi `lever12ghaving a pair of spaced radially extending arms 13 and rearwardly extending eye 14. The arms. 13 receive a pin 15 pro- )ected through a pair of arms 16,011 the outside of the arms 13. These arms 16 are prefv erably formed integral with a pad support 17' provided with a heated pad `18 having openings 19 for receiving heating elements. This pad is providedwith a strip 20 forengagement in the slot 10y of the stationary heated element. The lower ends of the arms 16 are provided with openings for receiving a rbolt 21 which is connected by links 22, one

on either side of thevwheel, to a pin 23 extendin'gifrom one rim 6 tothe other so that the faces of the two yheating elements move in parallelism with respect to each other.

is `provided with an opening 25 shown in dotted lines in Fig. 6 for the reception kof a fbolt 26`extending through the eye 14. Beytween the lever 24 and the eye is asuitable Pivoted upon the pin 11 is a pad shifting lever 24 of substantially the form shown in the drawings and'this lever is angular and` if purpose which will f cam 32 which is provided with a low portion 33 of a proper length to permit the release of the cardwhen it reaches a point near the trame at the back so that the card will slip out by gravity, this cam portion being equal to about one third of the entire circumference. Between the eXtreme lowy portion 33 and the main edge of the cam 32 is an interbetween the pads but will not be free `for easy movementtherebetween. The further rotation of the conveyer or Wheel carries the friction roller 29 on to thev extreme high part ofthe cani 32 with the result'that the mov- "able pad engages the tab and forces it tightly against thecard stock. Theparts are held in this posit-ion until the friction roller of this particular pad structure reaches the'l'oiv or release portion of the cam when the lowerr pad is released and the card may dropout of the machine.

f ln order to insure the release ot the mov-- able pad structures as they arrive at the lovv vpart of the cam an external cani 35 is formed upon the cam 32 and it engages on the outside oft the friction rollers 29 and tends to rock the pad shifting lever 24- in counter clock-Wise direction as rshown in 3. This external cam is supported by a web 36 secured to the cam 32 and at its lett, as shown in Fig. 3, it is provided with a pivoted eX- tension 37 mounted upon a pin 33. This eX- tension has a shoulder face 39 at a point correspond-ing to the point Where the roller passes on to the intermediate cam edge 34.

and a further curvednose shown at 40 permitting the passage ofthe roller onto the mani edge portion of the camV 32. These `parts are so positioned that when a tilxed and a relatively movable pad are at the liront,` as shown in Fig. 6, the roller 29 is en the intermediate portion 34 and is held thereagainst by the extension 37 by means of a spring 4l arranged between the entenY sion and the xed point. The object ot this yielding extension to lthe outer cam will appear later.

The receiving position of the pads is that represented in Fig. 6 by the two pads which have their faces separated vand`arranged horizontally in this figure and in feeding it is essential that, when the card with its tab supplied is placed between the pads, the o perator should be able to cause these par s to be clamped immediately and betere the Wheeli moves carrying the roller 29' onto the main edge of the cam 32 since the main supporting Wheel receives intermittent movement as will be brought out in the description of the driving mechanism. Suitable mechanism therefore is provided for temporarily closing the pads upon the work until the supporting Wheel moves and it comprises a hub 42 mounted upon the main supporting shaft 4 and provided with a ra- -dially extending arm 43 carrying at its outer end a temporary holding cam' 44 and this camhas; an edge face 45 coincident with the main edge of the cam 32 and an intermediate edge 46 coi-rrespondingto the intermediate cam edge 34. In other Words the cam edge of this temporary holding cam conforms to the contiguration ofthe edge ot the cam 32 from the main portion to the extreme re` duced portion 33 as is clearly shown in lFig. 6. The edge of' this temporary holding cam is engaged by each ot the rollers 29 inasmuch' as they are made Wide enough to accomplish this result. This temporary holding cam 44 normally assumes the position shown in Fig. 6, but, as soon as a card Where it is provided with an operating arm 50 connected to a suitable treadle `rod adapted to be actuated by any suitable treadle not shoivn, but capable ot performing the operation, the arrangement ort the treadle being unimportant-so tar as this invention is concerned.

ln order to support the cards on either side of the pads as they former are carried around suitable brackets are provided on each side of the pads and are secured to the rims 6 and! a description oit one will suflice for both. 'llachfotthese brackets comprises a face plate 52, an outwardly extending arm and spaced fingers 54, the spaces between the lingers ot corresponding brackets being in alinement with the spaces between the corresponding pads.

In vorder to insure the positive release of the cards from the pads a suitable device is provided and it comprises a pai-r ot fingers 55, which, in theinstance each complete pad structure7 are arranged in pairs and keyed-ite the pin or shafltv 23, one ot these fingers being-y provide'd with a trip arm 56 having a face 57 adapted to engage astop 53 secured tothe'.- Jiframe or to any other stationary part and; arrangml inthe pat-h of* these trips as they move down to the rear at the bottom as shown in Fig. 3. When one of these trips is engaged, the lingers move clock-wise and engage 4the card and push it from between the pads. These iingers are held in normal position or ,inward toward the supporting wheel by a coil spring 59 one arrangedk between each trip arm and one of the rims 6 of the wheel.

Suitable mechanism is provided yfor inter-l mittently rotating the supporting wheel and this mechanism is shown best in Figs. 4 and 5 and it will now be described. i

Loosely mounted upon the main supportingshaft 3 is a gear wheel 60 meshing with the gear wheel 61 mounted upon a main driving shaft 62 extending tothe outside of the frame Where it receives a' main driving gear 63 which meshes with a driving pinion 64, shownL in dotted lines in Fig. 1, and driven by a pulley 65. Secured upon the shaft 62 inside of the gear 61 is a crank disky 66 provided with a crank pin 67 carrying a friction roller 68. This roller is adapted to engage in a slot 69 provided in ithe end of a rocker arm 70 .loosely mounted upon the main supporting shaft 3. The rocker arm 70 is provided with an ear 71 carrying a pin 72 which receives a pawl 73 having a nose 74 and adapted for engagement in suitable notches 75 forming ratchet teeth 76 ina ratchet wheel 77 secured to the spokes 5 of the main supporting wheel. The pawl 78 is normally held in engagement with the ratchet wheel by a vcoil spring 7 8 and through the operation of the crank pin would tend to rotate the main supporting wheel one point for each revolution of the crank disk 66, but in order to prevent this and to hold the pawl out of engagement with the ratchet wheel during one movement of the rocker arm 70, the gear wheel 60 is provided with a cam 79 having a low portion 80 corresponding to one-half its circumference. The edge of this cam engages a friction roller 81 mounted upon a pin '82 supported in a link bracket 83 pivoted upon a pin. 84 mounted upon the` rocker arm. The pin 82 is connected by a link S5 with a pin 86 carried by the pawl near the outer end thereof.

The operation of this driving mechanism will now be described with reference `'to Fig. L and it must be understood that this figure is taken upon the line 4 4 of Fig. looking in the direction of the arrows and the sprocket wheel 77 which is thereforein front iu 4 is broken away as shown to show i the parts beyond in full line. yThe crank disk 66 rotates 1n a clockwlse dlrectlon and it has just completed its movement of they main supporting wheel for one step. `The further movementof the crank disk causes the crank pin to move over the center and shift the rocker arm in counter-clockwise direction thus drawingthe pawl Withfit. i

` will pass to thelow part of the cam permitting the pawlk yto engage the ratchet wheel and move the conveyor or wheel so that for each two Operations of the rocker arm the conveyer or wheel and the mechanism cark riedthereby is advanced onestep. The object of having mechanism of this type isto impart a vquick movement to the supporting wheel-andat the same time permit suiicient time betweenm'ovements to allow the oper-` ator to insert the work. v In order to lock the supporting wheelin `its proper position as it is advanced a suitable devlcei'is provlded and it comprises a support `87 secured to the frame having a lcylindrical portion 88 provided with au inwardly extending iange 89. This flange receives the flange 90y and locking bolt 91 which has a tapered end`92 for engagement in suitable sockets 93 properly spaced on the outer face of the ratchet wheel 77. A coil spring 94'is arranged about a stem 95 integral with `this boltand thrusts against theA kflange 90 at one end and against aplug 96 secured in thecylindrical portion 8S at the other.`

Heat may be supplied to the pads in any suitableimanner but I prefer to heat them relectrically by heating elements andeach ofA these elements comprises a tube 97 adapted to fit into the `opening of the pad providedy at each end Witha plug 98, vone of said plugs being bored out vto .receive an insulating bushing 99 in which is mounted a binder screw 100. Within this tubular casingk 97 is an insulating tube 101 adapted to receive the heating element which comprises avcore 102 surrounded by a coil 103 of resistance wire. The two leads-otthis wire are connected `under the two binding screws. These heat-l ing elements may be connected in any way desirable but I prefer to connect ther two elements of the same `pad in` series in which case the ends of an inner and au outer elcment ,ofk the same pad on one' side'of the conveyer are connected together and the end of the'innermost elementv on the opposite side of the conveyer is connected by a wire 104 with an inner bus bar ring 107. "This arrangement is continued around the wheel and these bus bar rings are supplied with current by a suitable brush and collector ring mechanism shown in Fig. 9. V

`The 'brushand collector ring structure comprises a. pair of' collector rings 108 and brush 116 mounted in a brush holder '117 supported by the block 112 and held thereon by bearing blocks 118. This brush is held down against its collector ring by a spring 119 and arm 120. The two brush holders are connected to the incoming Wires 121 and 122.

A suitable table 123 vis mounted in front of the machine in a position so that the Work may be moved from the surface of the table in between the pads.

Assuming 'that current issupplied to the machine and that the heating elements have been given suiiicient time to `properly heat the p'ads and that power is supplied .to the pulley and that the partsv at this particular moment are in the position shown in Fig. 6, the operator may then insert a card with a tab applied thereto, the, card having been irst m-oistened with alcohol, and may operate the tre'adle so as to rock the temporary holding cam in a countenclockwise direction. This causes the movable pad to engage the Work temporarily `and when the main conveyer or Wheel driving mechanism comes into operation the main conveyer or wheel will be moved one step and the card will be carried on clamped between the pads and Will be held until the movable tab is shifted by the mechanism already described when the card Will be released either by gravity or by the releasing lingers.

Having described my invention, I claim 1. In apparatus for securing tabs to sheets, a trame,` a movable carrier mounted therein and traversing a circuit, a plurality of pressi-ng devices each comprising a pad fixed upon the carrier and having a pressing face, a Arelatively movable padmounted upon the carrier and having a pressing face in parallelism With the 'face of the iixed pad when in pressing position, and an actuating lever therefor mounted in the carrier, a cani secured to the iraine in the path of the relatively movable pad operating lever and ,havingl a pad closing portion, a pad opening portion and an intermediate pad closing portion, the iirst portion holding the pads closed throughout a portion of the circuit, the opening portion holding the pads wide' open for a portion of the circuit and the intermediate portion partially closing the pads to bring them Iinto receiving position', and means tor' actuating` the carrier.

2:111 'appar-atu-s` -for securingftabs to sheets, a frame, a movable carriermounted therein and'traversing a circuit, a plurality of pressing devices each comprising a pad iXed upon the carrier and h ving a pressing face, a relatively movable pad mounted upon the carrier `andih'aving a pressi-ng face in parallelism with theface of the fixed pad when in pressing position," an actuating lever therefor mounted in the carrier, a cam secured to the'frame in the path of the relatively movable pad .operating lever' and having a pad closing portion, a pad opening portion and an kintermediate pad closing portion, 'the first portion holding the pads closed throughout a portion of the circuit, the opening portion .holding the pads wid-e open for a portion of the circuit, and they intermediate i portion partially closing the pads to bring` them into receiving position, additional means for positively opening the relatively movable pads at theopening portion of the cam, and means for actuating the carrier.

In apparatus ior securingl tabs to sheets, aA frame, a movable carrier mounted therein and traversing a circuit, a plurality of pressing devices each comprising a' pad fixed upon the carrier and having a pressing face, a relatively movable pad mounted upon'the carrier and having,T a pressing face in parallelism ivith the `lace oi the fixed pad when in pressing position, an actuating lever thereforinounted in the carrier, means for bringing the pads into pressing position and tor holding them 4in suclr'pbsitioir durin g a predetermined portion of their course in the circuit of the carrier, means tor openfing the pads, means for actua-ting the carrier, a cani secured to the frame and having an edge closing portion iny two steps, one a primary step for partially closing Jthe pads and another secondary portion for holding -th'e pads tightly closed upon the worlr, a

cam groove adapted to positively engage the' movable pad operating lever and open the pads, and means for actuating the carrier.

ll. In apparatus for securing tabs to sheets, a frame, a movable carrier mounted therein and traversing a circuit, a plurality ol' pressing devices each comprising a pad flied upon tliecarrier and having a pressing face, a relatively movable pad mounted upon lthe carrier and having a pressing face in parallelism `with the face of the fixed pad when in pressing position, a lever structure tor actuating the movable pad and comprising a lever pivoted tothe carrier and ou one side oi' its pivot engaging the relatively :movablefpad andhaving an arm projecting from the other side of its pivot, a lever arm v'pivotally mounted, a yield-ing connection between thisarm and the actuating arm oi the pad lever, means forV engaging the lever actuatingfarms toiclosel ther-pressing devices;

when in pressing position, a lever structure for actuating the movable pad and comprising a lever pivoted to the carrier and -on one side of its pivot engaging the relatively movable padand having an arm projecting from the other side ol" its pivot, a lever arm pivotally mounted, a yielding connection between this arm and the actuating arm of the pad lever, a cam for engaging the lever to close the pressing devices and hold them closed during a certain portion rof their movement in the circuit, and means for actuating the carrier.

G. In an apparatus for securing tabs to sheets, a movable carrier, a plurality of pressing devices arrangedupon the. carrier, means for closing 'said pressing devices upon the tabbed sheet, electrically heated.`

units arranged in said devices, means ior supplying current thereto comprising pair of rings 01"' opposite polarity mounted upon the carrier, electrical connections between the rings and the element, collector rings mounted lupon thel carrier, brush structure.u

4 coperating with the. collector rings, and

means for actuating the carrier.

7. Apparatus for securing tabs to sheets, comprising a series of pressing devices Jfor exerting pressure on the assembled tab and sheet, said devices being movable through a predetermined path, and means spaced along said path for fully" closing, fully opening, and partially closing said 'devices in order.

8.` Apparatus for securing tabsto sheets, comprising a series of pressin ,devices for exerting pressure on the assem led tab and sheet, said devices being movable through a predetermined path, means located adjacent said path operable at Will for Aclosing said devices, and means for traversing said devices together oversaid path.

9. Apparatus for securing tabs to sheets,

comprising a series kof pressingk devices-for.

exerting pressure onthe assembledtab and sheet, said'devices being movable through a predetermined path, meanslocated adjacent ,oneportioirof ksaid path operable at will tor closing said. devices, means for traversing said devicesoversaid path, and means located adjacent anotherfportion'of `said path for opening said devices by their movement along said path; i

11. Apparatus for securing tabs to sheets,

comprising a series of pressing devices fory exerting pressure on the assembled tab and sheet,\sa1d devices being movable through a predetermined path, means located adjacent one portion of said path operable at Will.

for closing said devices, means for traversing said devices over said path, and means located adjacent other portions of said path :tor fully opening and then partially closing said devices. i

12. Apparatus for securing tabs to sheets, comprising a series of pressing devices for exerting pressure on the assembled tab and sheet, said devices being movable through a predetermined path, means 4located adjacent one portion of said path operable atwill for closing said devices, means fortraversing said devices over said path, and means located adjacent other portions of said path for fully openingand then partially closing said devices by their movement along said path. j f

13. Apparatus for securing tabs to sheets, comprising a series ofpressing devices for exertingpressure on the assembled tab and sheet, said devices being movable through a predetermined path, means located adjacent comprising a lseries of pressing devices forv exerting pressure on the assembled tab and sheet, said devices being movable through a predetermined path, means located adjacent one portion of said path `operable at will for closing said devices, means for traversing said devices over said path, and means for holding ksaid devices closed While moving along said path and for then opening and partially closing said devices.

15. yApparatus for securingtabs to sheets, comprising a series .of pressing devices for exerting pressureon the assembled tab and sheet, said devices being movable through a predetermined path, means spaced alongsaid path for yfully closing, lfully opening, and partially closing said devices'in order, and Vmeans for supplying heat to said devices While traveling along said path. Y

16. .Apparatus for securing tabs tosheets, comprising a series ofpressing devices for exerting pressure on the assembled tab and sheet, said devices being movable through a predetermined path, means located adjacent one portion of said path operable at Will for closing said devices, means for traversing said devices over said path, and means for supplying heat to said' devices While traveling along said path.

17. Apparatus for securing tabs to sheets, comprising a series of pressing devices for exerting pressure on the assembledtab and sheet, said devices being movable through a predetermined path, means located adjacent one portion of said path operable at Will for closing said devices, means `for traversing said devices over said path, means located adj acent another portion of said path for opening said devices, and means for supplying heat to said devices While traveling along said path.

18. Apparatus for securing tabs to sheets, comprising a series of pressing devices for exerting pressure on the assembled tab and sheet, said devices being movable through a predetermined path, means located adjacent one portionof said path operable at will for closing said" devices, means for traversing said devices over said path, means located adjacent another portion of said path for openingv said devices by their movement along said path, and means for supplying heat to said devices While traveling along said path.

19. Apparatus for securing'tabs to sheets, comprising a series of pressing devices for exerting pressure on the assembled-tab and sheet,` said devices being movable through a predetermined path, means located adjacent one portion of said path operable at will for closing said devices, means for traversing said devices over said path, means located adjacent other portions of said path for fully opening and then partially closing said devices, and means for supplying heat to said devices While traveling along said path.

20. Apparatus for securing tabs to sheets, comprising a series of pressing devices for exerting pressure on the assembled tab and sheet, said devices being movable through a predetermined path, means located adjacent one portion of said path operable at will for closing said devices, means :tor traversing said devicesover said path, means located adjacent other portions of said path for Jfully opening and then partially closing said devices by their movement along said path, and means for supplying heat to said devices While traveling along said path.

21. Apparatus for securing tabs to sheets, comprising apseries of pressing devices for exerting pressure upon the assembled tab and sheet, said devices being movable together through a predetermined path, means for advancing said devices along said path by a step by' step movement, and means operable atwvill or closing said devices between successive movements along said path.

22. Apparatus :tor securingtabs to sheets, comprising a series of pressing devices for exerting pressure upon the assembled tab and sheet, said `devices being movable together through a predetermined path, means for advancing said devices along said path by a step by step movement, means operable at Will for closing said devices between successive movements along said path, and means 'along said path for maintaining said devices closed While traversing said path.

23. Apparatus for securing tabs to sheets, comprising aV series of pressing devices for exerting pressure upon the assembled tab and sheet, said devices being movable through a predetermined path, "means for advancing said devices along said path by a step by step movement, means operable at will for closing said devices between successive movements along said path, and means for supplying heat to said devices while traveling along said path.

24. Apparatus for securing tabs to sheets, comprising a series of pressing devices for exerting pressure yupon the assembled tab and sheet, said devices ybeing movable `through a predetermined path, 'means for advancing said devices along said path by a step by step movement, means operable at will for closing said devices between successive movements along said path, means for supplying heat to said devices While travelins along Said path, and moons for main* taining said devices closed While traversing said path.

25- Apparotus for .Securing talos to Shoots comprising a series of pressin devices for @Korting pressure on the ossonilod tab and sheet, said devices being bodily lmovable tosotllor through a predetermined path, oaoh of said devices comprising a relatively stationary pad and a cooperating pad movable relative thereto andhaving a" pressing face parallel with tho face of the .fxdpad when 1.1.1 pressing position., and moans/Station@ relativo to .Said movable pressing devices auf. located adjacent ono portion olfv Said path and operable at will for aotuating Said Ipovable pad.

26- Apparatus for .Securing talos to Shoots, comprising a series of' pressing devices for exerting pressure on the assembled tab and sheet, said devices being bodilyl movable together through a predetermined path, each of said devices comprising a relatively Vstatonoly pod and a Cooperating pad movable relative thereto and having a'pressing face parallel with the face ofthe fixed' pad when in prossime position, moons Stationary roletive to said movable pressing devices and located adjacent one portion of said path and operableat will for actuating said movable pad, and means extending along said path for maintaining said pads in coperating pressing relation While moving along said path.

27. Apparatus for securing tabs to sheets, comprising aclserles of pressing devices for exerting pressure on the assembled tab and sheet, said devices being bodily movable through a predetermined path, each of said devices comprising a relatively stationary pad and a coperating pad movable relative thereto and having a pressing face parallel With the face ofthe lined pad when in pressing position, means stationary relative to said movable pressing devices and located adjacent one portion of said path and operable at Will for actuating said movable pad, and means for supplying heat to said pads While traveling along said path.

28. Apparatus for securing tabs to sheets,

comprising a series of pressing devices for exerting pressure on the assembled tab and sheet, said devices being bodily movable through a predetermined path, each of said devices comprising a relatively stationary pad and a cooperating pad movable relative thereto and having a pressing face parallel Withthe face of the lined pad When in pressing position, `means stationary relative to said movable pressing devices and located adjacent one portion of said path and operf able at Will for actuating said movable ad, means for supplying heat to said pads 'W ile traveling along said path, and means located adjacent one portion of said path and arranged to open said devices in order by their movement along said path. n

29. Apparatus for securing tabs to sheets, comprising a series of pressing devices for exerting pressure on the assembled tab and sheet, sheet holding means adjacent each of said pressing devices, said devices being movable through a predetermined path, means located adjacent one portion of said path operable at Will for closing said devices, and means for traversing said devices and said sheet holding means through said ath.

p In testimony whereof I affix my FRANCIS M.

sifrnature.

oisE. 

